Truck window
Asked by Whitboy32789 May 09, 2017 at 10:30 PM about the 1989 Ford F-150 XLT Lariat Extended Cab SB
Question type: Maintenance & Repair
Window motor works but won't go up but will go
down using the button
2 Answers
sixfootsix_car_guy answered 6 years ago
The motor itself may be shot. There are two "gears" to a window motor, one that controls the up function, and one that controls the down. You can pull one from a junk yard for super cheap, and its an easy DIY. Best of luck!
The motor is probably shot as it has to work harder to push the window up because gravity assists when going down. Find the two leads going to the DC electrical motor and disconnect at the switch. Test the motor with a 2 volt battery. If the motor turns when connected, reverse the polarity at the connection point and the window motor should turn in the other direction. If he doesn't turn, with no load, it's shot.